Water-soluble disazo pyrazole dyestuffs containing fiber-reactive substituents

ABSTRACT

Water-soluble disazo dyestuffs are described, the molecule of which contains a 3- or 4-(pyrazolylene-(1)-benzoylamino)-6sulphophenyl moiety wherein the 4-position of the pyrazole ring and the 1-position of the sulphophenyl group, respectively, are linked each to one of the two azo bridges in the said molecule; these dyestuffs have from zero to at most two fiber-reactive groupings and are useful as dyes for cellulose and polyamide fibers.

United States Patent Ackermann et al.

WATER-SOLUBLE DISAZO PYRAZOLE DYESTUFFS CONTAINING FIBER- REACTIVE SUBSTITUENTS Inventors: Hans Ackermann, Riehen; Fabio Beffa, Basle, both of Switzerland Assignee: Ciba-Geigy AG, Basle, Switzerland Filed: Aug. 20, 1968 Appl. No.: 753,876

Foreign Application Priority Data Aug. 21, 1967 Switzerland ..11738/67 US. Cl. ..260/154, 260/155,.260/158, 260/160, 8/1 D, 260/163, 260/310 A, 8/1 E, 260/310 R, 8/] B, 8/11-1, 8/1 J, 8/1 K, 8/1 P,

Int. Cl. ..C09b 62/08 Field of Search ..260/153, 154, 158, 160

[56] References Cited UNITED STATES PATENTS 3,196,145 7/1965 Reding et a1 ..260/153 Primary Examiner-Joseph Rebold Assistant Examiner-Dona1d M. Papuga Attorney-Wenderoth, Lind & Ponack [57] ABSTRACT Water-soluble disazo dyestuffs are described, the molecule of which contains a 3- or 4-[pyrazo1y1ene- (1)-benzoylamino]-6-sulphopheny1 moiety wherein the 4-position of the pyrazole ring and the l-position of the sulphophenyl group, respectively, are linked each to one of the two azo bridges in the said molecule; these dyestuffs have from zero to at most two fiber-reactive groupings and are useful as dyes for cellulose and polyamide fibers.

8 Claims, No Drawings WATER-SOLUBLE DISAZO PYRAZOLE DYESTUFFS CONTAINING FlBER-REACTIVE SUBSTITUENTS The present invention concerns new, water-soluble disazo dyestuffs, processes for the production thereof, processes for the dyeing and printing of organic materia], particularly natural and synthetic polyamide, and natural and regenerated cellulose textile material using the new dyestuffs, as well as, as industrial product, the organic material dyed or printed with the aid of these dyestuffs.

The new, valuable, water-soluble disazo dyestuffs are of general formula I A represents an unsubstituted or non-chromogenically substituted phenyl or unsubstituted or nonchromogenically substituted naphthyl radical, B represents the radical of an azo dyestuff coupling component, represents a divalent unsubstituted or nonchromogenically substituted 1,3- or 1,4-phenylene radical, R represents lower alkyl or COO-M", X represents hydroxy or amino, Y represents a reactive grouping capable of covalent bonding with cellulose and polyamide fiber molecules, which grouping is linked to a carbon atom of A or B, Z represents a water-solubilizing group which dissociates acid in water, and which is linked to a ring carbon atom ofA, Q or B, M represents the equivalent of a colorless cation, m represents a positive integer of at most 3, and n represents a positive integer of at most 5, and in such dyestuffs in which m is 3, one Y is linked to A and the other to B.

These dyestuffs are obtained when the diazonium compound of an amino azo dyestuff of the general formula ll is coupled with a coupling component of the general formula III B H the components ll and Ill being so chosen that they each contain at most one reactive substituent Y and together contain at most four groups Z. The symbols in formulae ll and Ill have the meanings given in formula I.

Non-chromogenic substituents are substituents which do not fundamentally alter the chromogenic system of the dyestuff as shown in Formula I, (contrary to such substitutents as anthraquinonyl or phthalocyanine radicals which would alter such system).

Primarily, A represents a phenyl radical, optionally also, a naphthyl radical, which can contain the ring substituents usual in azo dyestuffs. Examples of such are: lower alkyl groups such as the methyl, ethyl, propyl, isopropyl or tert. butyl group, halogen atoms such as fluorine, chlorine and bromine, the nitro group, aliphatic or aromatic acylaminogroups such as the acetylamino or benzoylamino group, the ethoxycarbonylamino group, lower alkoxy groups such as the methoxy or ethoxy group, lower alkylsulphonyl and sulphamoyl groups or sulphamoyl groups substituted by lower alkyl groups. Preferably, the radical A is a phenyl radical which contains a sulphonic acid group in o-position to the azo bond and which can contain the reactive substituent Y.

Examples of coupling components of the general formula III which introduce the radical B into the disazo dyestuffs according to the invention are: phenols such as 4-methylphenol, 4-acetylaminophenol or 3,4- dimethylphenol; anilines such as m-methyl aniline or m-methoxy aniline; naphthols such as B-naphthol, 2- hydroxynaphthalene-3- -4-, -6-, -7- sulphonic acid, 2- hydroxynaphthalene-6,8-disulphonic acid, I -hydroxynaphthalene-4-sulphonic acid, l-hydroxynaphthalene-3,6-, -3,8- or -4,6-disulphonic acid; naphthylamines such as l-aminonaphthalene-4- sulphonic acid; Z-aminonaphthalene-S- or -6- sulphonic acid, Z-aminonaphthalene-S,7-disulphonic acid; aminonaphthols such as l-hydroxy-6- aminonaphthalene-3-sulphonic acid, l-hydroxy-7- aminonaphthalene-3-sulphonic acid, I-hydroxy-8- aminonaphthalene-3,6-or 4,6-disulphonic acid, 1- hydroxy-8-benzoylaminonaphthalene-3,-disulphonic acid. Preferably, heterocyclic coupling components are used, in particular pyrazol-S-ones such as 3-methylpyrazol-S-one, chiefly however, l-phenyl-3-methyl-, lphenyl-3-carboxy-, l-phenyl-3-carbamidopyrazol-5- ones such as l-phenyl-3-methyl-pyrazol-5-one, l-(2',5 '-disulphophenyl)-3-methyl-pyrazol-5-one, l-( 4 sulphophenyl)-3-carboxy-pyrazol-5-one, l-( 2 '-chloro- 5 -sulphophenyl)-3-methyl-pyrazol-5-one, l-( 2 ,5 dichloro-4-sulphophenyl)-3-methyl-pyrazol-5-one, l- (4'-methyl-2-sulphophenyl)-3-methylpyrazol-5-one, l-(4'-sulphophenyl)-3-methyl-pyrazol-5-one, l-( 4- carboxy-Z' -sulphophenyl)-3-methyl-pyrazol-5-one, also l-naphthyl-3-methyl-pyrazol-5-ones such as l- (4',8-disulphonaphthyl-2)-3-methyl-pyrazol-5-one, or S-aminoor -5-iminopyrazoles such as l-phenyl-3- methyl-S-aminopyrazole, l-(3'-sulphophenyl)-3- methyl-S-aminopyrazole, or pyrimidines, particularly 2,4,6-triaminopyrimidines such as 2-amino-4,6-di-nsulphophenylamino-pyrimidine, or 2,4,6-trihydroxypyrimidine derivatives such as N-methyl-N'-mchlorophenyl barbituric acid.

Sulphonic acid or carboxyl groups, lower alkyl groups such as the methyl, ethyl, propyl, isopropyl or nbutyl group, or halogen atoms such as fluorine, chlorine or bromine are used as substituents in the mor p-phenylene radical Q. Preferably however, Q is not further substituted.

R in the meaning of a lower alkyl group can be, eg a methyl, ethyl, propyl, isopropyl or n-butyl group. Preferably R is the methyl group.

Preferred water-soluble disazo dyestuffs of formula I contain one or two fiber-reactive substituents Y, capa-. ble of chemical bonding especially to cellulose fibers. in these dyestuffs n ranges preferably from 2 to 5. The fiber-reactive component of these substituents can be bound directly or by way of bridging members such as oxygen, sulphur or methyleneimino, preferably however, by way of an imino, carbonylimino, sulphonylimino or ureylene group, to an aromatic ring A and/or B of the dyestuff molecule. Such substituents can be introduced into the disazo molecule by the usual conversion reactions in any step of the dyestuff production desired.

Examples of such substituents Y are: the radical of an acid containing at least one mobile halogen atom and/or a C-C-polylinkage to which addition can be made, e.g. chloroor bromoacetic acid, B-chloro, and B-bromopropionic acid, tetrahalogen cyclobutane carboxylic acid such as 2-chloro-2-fluoro-3,3-difluorocyclobutane- 2-carboxylic acid, propiolic acid, acrylic acid, methacrylic acid, a-chloro-, B-chloro, a-bromoand B-bromoacrylic acid, a,B- and B,B-dichloroacrylic acid, :,[3- and [3,B-dibromoacrylic acid, trichloroor tribromoacrylic acid, crotonic acid, aor ,6- chlorocrotonic. acid, a-or fi-bromocrotonic acid, a,,B- dichlorocrotonic acid, maleic acid, monochloroand monobromomaleic acid, dichloroand dibromomaleic acid, fumaric acid, monochloroand monobromofumaric acid, dichloroand dibromofumaric acid, fumaric acid monoester, dichloroand dibromosuccinic acid, or the radical of a nitrohalogen benzoic acid or nitrohalogen benzene sulphonic acid having a mobile halogen atom, particularly fluorine or chlorine in 0- or p-position to the nitro group, such as the radical of 3- nitro-4-fluoro-benzoic acid or 3-nitro-4-fluorobenzene sulphonic acid.

B-Hydroxy-alkylsulphonyl or fl-hydroxy-sulphamoyl groups 'esterified with strong acids such as the ,8- halogenoethylsulphony] and, preferably, ,8- sulphatoethyl-sulphonyl group, for example, are used as fiber-reactive radical Y bound direct to an aromatic ring, preferably to one of the radicals A and B of the dyestuff molecule.

However, fiber-reactive dyestuffs obtainable according to the invention preferably contain, as reactive substituents Y, the radical of an aromatic nitrogen heterocycle having, advantageously more than one ring hetero atom, which heterocyclic ring contains at least one mobile halogen atom or several mobile halogen atoms, preferably chlorine, but also fluorine or bromine, or an ammonium, sulphonic acid or alkylsulphonyl group, at a ring carbon atom. Such a heterocyclic ring can be bound to the molecule of disazo dyestuffs according to the invention by way of an amino group or, optionally, by way of a carbonyl or sulphonyl amide group.

Examples of such preferred substituents Y .are: a triazinyl or diazinyl radical bound by way of an imino, carbonylimino or ureylene group, which radical contains at leastone mobile halogen atom, e.g. the radical of cyanuric chloride, cyanuric bromide or primary condensation products thereof in which a halogen atom is replaced by the optionally further substituted radical of a primary or secondary aliphatic, alicyclic, aromatic or heterocyclic amine, in particular by aniline or its alkyl, and sulphonic acid or carboxylic acid derivatives, by

lower monoand dialkylamines, as well as by ammonia, or by the radical of an aliphatic, alicyclic, aromatic or heterocyclic hydroxy or thiol compound. Primarily, however, the fiber-reactive substituent Y represents a polyhalogen pyrimidyl radical such as the dichloro-, dibromo-, difluoro-, dichlorobromo-or dichlorofluoropyrimidyl radical or, particularly the trichloro-, tribromo-, trifluoroand difluorochloro-or dichlorofluoro-pyrimidyl radical. The dihalogen pyrimidyl radical can contain for example, the following substituents in the 5-position; methyl, ethyl, carboxylic or sulphonic acid amide optionally substituted at the nitrogen atom, carboxylic acid methyl or ethyl ester, acyl, e.g. benzoyl, alkylene, e.g. allyl, chlorovinyl, substituted alkyl e.g. carboxymethyl, chloro-or bromomethyl, particularly however, halogen. Advantageously, the substituent Y also represents the radical of a reactive heterocyclic carboxylic or sulphonic acid such as the radical of halogen pyrimidine carboxylic acid, or 2,3-dihalogen quinoxaline carboxylic or sulphonic acid, of 2-Halogen benzothiazole or 2-halogen benzoxazole carboxylic or sulphonic acid, of halogen phthalazine carboxylic acid,

halogen quinazoline carboxylic acid, of halogen quinoxaline carboxylic or sulphonic acid, or of halogen-6- pyridazon-l-yl-alkylene carboxylic acid or of halogen- 6-pyridazon-l-yl-phenylene carboxylic acid. The following compounds which introducethe radical Y are particularly suitable: 2,4,6-trichlorotriazine, 2,4,6- tribromotriazine, 2,4,6-trichloro-, 2,4,6-trifluoroor 2,4,6-tribromo-pyrimidine, 2,4,6-trifluoro-5-chloroor 2,4,6-trichloro-52,4,5,6-

tetrachloroor 2,4,5,6-tetrabromopyrimidine, 2,4- dichloropyrimidine-S- or -6- carboxylic acid, 2,3- dichloroquinoxaline-6-carboxylic acid or 2,3- dichloroquinoxaline-fi-sulphonic acid, 2- chlorobenzothiazole-5- or -6- carboxylic or-sulphonic acid, 2-chlorobenzoxazole-5- or --6- carboxylic or sulphonic acid, l-4-dichloroor 1,4-dibromophthalazine-6-carboxylic or -6-sulphonic acid, 2,4- dichloroquinazoline-6- or -7-carboxylic acid, 2,3- dichloroquinoxazoline-7-carboxylic or -7-sulphonic acid, 4,5-dichloro-6-pyridazon-l yl-trimethylene or l,4'-phenylene carboxylic acid.

Advantageously each of the radicals A or 8 contain at most one such reactive substituent Y, preferably a triazinyl or diazinyl radical having at least one mobile halogen atom, which radical is bound by way of an imino, carbonylimino or ureylene group.

Particularly valuable are those dyestuffs of formula I in which Y represents a fiber-reactive grouping selected from (I) R; Hal

Hal

(II) R2 Hal (III) N 02 N O 2 Hll Hal representing fluorine, chlorine or bromine,

Hal representing chlorine or bromine,

R, representing hydrogen, chlorine, bromine or cyano, R representing fluorine, chlorine, bromine, lower althe bond l being linked to the remainder of Y.

As salt-forming, water-solubilizing groups which dissociate acid in water, corresponding to Z, dyestuffs according to the invention preferably contain sulphonic acid groups, also phosphonic acid groups or carboxyl, or disulphimide or monoester groups of polybasic acids, e.g. sulphate groups. 2 in the dyestuff molecule can also have several of these meanings.

The water-soluble disazo dyestuffs of formula I according to the invention can be produced by the usual methods. They are obtained as mentioned hereinbefore, e.g. by coupling a diazotized aminoazo dyestuff of general formula II with a coupling component of general formula III, advantageously in weakly acid to neutral medium and at a temperature of 0-40C, precipitating the dyestuff formed by the addition of a neutral salt such as sodium or potassium chloride, isolating by filtration and then drying the filter residue, optionally at a raised temperature and in vacuo. If desired, a subsequent purification to remove undesirable side products is indicated which can be done eg by dissolving the disazo dyestuffs in water and recrystallizm aminoazo dyestuffs of general formula II are produced in the known way, e.g. by coupling diazotized aromatic amine the aryl part'of which corresponds to the definition of A, with a compound of general formula lV wherein Q, R and X have the meanings given in form ula 1. Particularly suitable diazo components are derived e.g. from the following aromatic amines: laminobenzene-2-, 3- or 4- sulphonic acid, l-amino-4- methylsulphonylbenzene, l-amino-3- or 4- sulphamoylbenzene, l-amino-2-, 3- or 4-methylbenzene, l-amino-2-, -3- or -4- methoxybenzene, lamino-2-, 3- or 4-ethoxybenzene, l-amino-2-, -3- or 4-methylbenzene, l-amino-2-, 3- or 4- carboxybenzene, l-amino-3- or 4- acylaminobenzene eg 1- amino-3acetylaminobenzene or l-amino-4-benzoylaminobenzene, l-aminobenzene-2,4- or 2,5- disulphonic acid, l-amino-4-methylbenzene- 2- sulphonic acid, lamino-2-chlorobenzene-4-sulphonic acid, 1amino-4-methoxybenzene-2sulphonic acid, 1- amino-4acetylaminobenzene-2-sulphonic acid, lamino-4-methyl-5ethoxycarbonylaminobenzene2- sulphonic acid as well as laminobenzene-Z-sulphonic acid, which have a reactive substituent Y in 4- or 5- position such as the l-amino-4- or 5- (4,6- dichlorotriazinyl-2'amino)-benzene-2-sulphonic acid, l-amino-4- or -5-(2',4',5-trichloropyrimidyl-6'- amino)-benzene-2-sulphonic acid; also anaphthylamines such as l-amino-naphthalene-3-, -4-, 6- or 7- sulphonic acid or l-amino-2-methoxynaphthalene-6-sulphonic acid, ,B-naphthylamines such as 2-amino-naphthalene-l-, -5-, 6- or 7- sulphonic acid, 2-amino-naphthalene-l ,5--4,8- or 5 ,7- disulphonic acid or 2-amino-naphthalene-l,5,7- trisulphonic acid.

The compounds of general formula IV are obtained by known methods, eg by conversion of l-aminophenyl-4-(N-3 [or -4 ]-acetylamino-4 [or -3 ]-sulphophenyl)-carboxylic acid amide into pyrazol-S-one or 5- imino-pyrazole by way of the corresponding 1- hydrazino derivative and subsequent saponification of the acetyl group in hydrochloric acid solution.

A modification of the process according to the invention for the production of new, water-soluble disazo dyestuffs of formula I consists in reacting a disazo dyestuff of the general formula V wherein R preferably represents hydrogen or lower Starting materials of formula V wherein .1YIH RI represents a reactive amino group, can be obtained e.g. by saponification of disazo dyestuffs of formula I con taining instead of the group Y an acylamino group, which can be obtained according to the invention. They can also be produced by reduction of corresponding disazo dyestuffs of formula I containing a nitro group instead of an acylamino group. These acylamino or nitro disazo dyestuffs can be produced by the usual diazotization and coupling methods.

As suitable compounds introducing the fiber-reactive substituent Y for this embodiment of the invention, of course the halides, particularly the chlorides or anhydrides of the carboxylic and sulphonic acids mentioned in the discussion of Y as well as isocyanates or isothiocyanates or halogen triazines and diazines having more than one mobile halogen atom are used.

The reaction of the amino disazo dyestuffs of general formula V with the agents mentioned to introduce the reactive substituent Y is performed in the usual way,

advantageously in aqueous medium, optionally in the presence of inert organic solvents which can easily be removed, such as lower aliphatic ketones e.g. acetones, and preferably in the presence of agents which buffer mineral acid such as sodium or potassium carbonate, sodium or potassium hydroxide, dior tri-sodium phosphate,,di-or tripotassium phosphate, sodium or potassium acetate, or tertiary nitrogen bases such as pyridine.

On completion of the reaction, the completely formed reactive dyestuff is salted out of its optionally previously neutralized solution or suspension with sodium chloride, or potassium chloride, or it is precipitated with acid, then filtered off under suction, washed and dried, optionally at a raised temperature and under reduced pressure.

Finally, another modification of the process for the production of the new disazo dyestuffs consists, in treating a disazo dyestuff of general formula VI wherein A,B,Q,R,X,Z, m and n have the meanings given in formulae I, II, III and V, with compounds which introduce ester groupings.

The esterification of the aliphatic hydroxyl group is performed in the usual way, using e.g. phosphoric acid, chlorosulphonic acid, sulphur trioxide, addition products of sulphur trioxide to nitrogen bases such as pyridine, chiefly however, using sulphuric acid or mixtures of sulphuric acid and sulphur trioxide as compounds introducing ester groups.

Disazo dyestuffs of general formula VI can also be produced by known processes, e.g. by coupling a diazotized amino azo dyestuff of general formula II with a coupling component of general formula III, whereby at least one of the two components entering SOQH into the couplingreaction has a B-hydroxyethylsulphonyl radical. substrates.

The new dyestuffs obtainable according to the invention are yellow, orange or red powders which, in the form of their alkali metal salts, dissolve well in water. They are suitable for the dyeing and printing of organic material, particularly natural and synthetic polyamide, ornatural or regenerated cellulose textile material in yellow, orange to red shades by the processes usual for these subtrates.

Dyestuffs of formula I in which m is preferably 1 and n is l or 2 have very good affinity to natural polypeptides such as wool or silk, chiefly however, to synthetic polyamide fibers such as Nylon, Perlon and Banlon, and they draw completely ontothis material, in many cases even from a neutral to weakly acid, e.g. weakly acetic acid, bath and produce level, non-Streaky dyeings, some of which are brilliant. If desired, the watersolubility of such dyestuffs is increased by the admixture of anion active or non-ionic wetting or dispersing agents or of diluting agents. They are distinguished by good migratory powers on the fibers mentioned. Often, the addition of compounds containing basic nitrogen is indicated on dyeing, e.g. the addition of polyquaternary ammonium compounds. The dyeings with the watersoluble disazo dyestuffs according to the invention on synthetic polyamide such as Nylon 6 or Nylon 66 have excellent wet and light fastness. Surprisingly, mixed fabric made of nylon and wool is dyed in the same shade. On using reactive dyestuffs, the .dyeing can be advantageously given a subsequent treatment with mineral acid binding agents such as ammonia or hexamethylenetetramine.

The new reactive disazodyestuffs of formula I, obtainable according to the invention are, however, particularly suitable for the dyeing and printing of natural and regenerated cellulose material such as viscose staple fiber, jute, ramie, hemp and, primarily, cotton. In this case, to attain sufficient solubility, the dyestuffs should generally contain at least two, preferably three to four, water-solubilizing groups which dissociate acid in water, particularly sulphonic acid and also carboxyl groups.

These materials are dyed with the reactive dyestuffs obtainable according to the invention by known methods. For example, the cellulose material is impregnated or printed at a low temperature, e.g. at

or printing pastes, after which the dyeing is developedv by heating or steaming for a short time at temperatures of over 100 to l60C or by storing for a longer time at room temperature. The addition of hydrotropic agents to the printing pastes and impregnation liquors is ad vantageous in this process, e.g. the addition of urea in amounts of 10 to 200 g per liter of dyeing agent. Cellulose material is advantageously dyed by the exhaustion process by introducing the cellulose to be dyed into the dyebath (long liquor ratio) which contains an acid binding agent and,-optionally also neutral salts such as sodium chloride or sodium sulphate, at a slightly raised temperature, gradually raising the temperature of the dyebath to 40l00C and completing the dyeing 9 l process at this temperature. If desired, the addition of precipitating the dyestuffs with potassium chloride or the neutral salts to the dyebath to accelerate the drawammoniu chlo ide in lieu of sodium chloride. ing of the dyestuff can be made after the actual dyeing EXAMPLE 1 803B OH 1 NQ-CO-NHQ soar I I I N N=N0H, NH H3 liq HO- N Cl CI L\N C1 SOaH Hols temperature has been attained. Furthermore, in spite of 75.8 g of the monoazo dyestuff obtained by coupling great affinity to cellulose, the dyestuffs according to the diazotized 2-amino-4-(2',5 '-6'-trichloropyrimidyl-4 invention have good solubility and little sensitivity to amino)-benzene sulphonic acid with l-phenyl[4-N- electrolytes, and the unfixed dyestuff can be easily (3"-amino-4"-sulphophenyl)-carbonamide]-3-methylwashed out, this being one of the essential prerequisites pyrazol-S-one, in the form of the sodium salt, are slurfor good wet fastness properties such as good fastness 2O ried in 800 ml of warm water. The pH is 7-8. 45 ml to washing, alkali, milling and perspiration. The dyeof concentrated hydrochloric acid and then, within 15 ings not only have the usual good wet fastness properminutes, a solution of 6.9 g of sodium nitrite in 20 ml of ties but, in particular, they also have very good fastness water are added dropwise while stirring. After 2 hours, to light; they are fast to boiling and, when combined a solution of 36.0 g of l-(2',5-disulphophenyl)-3- with synthetic resin finishes, there is no change of methyl-pyrazol-S-one in 200 ml of water is poured in shade. Thus, because of the simultaneous combination and the pH of the reaction mixture is adjusted to 7 with of all of these valuable properties, the dyestuffs accordsodium carbonate. On completion of the coupling, the

ing to the invention are superior to the nearest comyellow dyestuff is completely precipitated by the addiparable known reactive dyestuffs. tion of sodium chloride, filtered off and dried in vacuo Particularly valuable, easily accessible, fiber-reative at 7080.

disazo dyestuffs according to the invention which are The intermediate product, l-phenyl[4'-N-(3"- distinguished by their greenish yellow shades and good amino-4"-sulphophenyl)-carbonamidel-3-methyldyeing properties are derived from disazo dyestuffs of pyrazol-S-one, necessary to produce this dyestuff is obgeneral formula I wherein A is a phenyl radical which tained by condensation of 4-nitro-benzoyl chloride has a sulphonic acid group in o-position to the azo bond with 2,4-diaminobenzene sulphonic acid, acetylation of and which contains, as further substituent, a triazinyl or th c nd ns ion product i h acetic i hy id diazinyl radical Y having at least one mobile halogen du on o the nitro group with iron powder, converatom, which radical is bound by way of an imino, carsion of the amino compound by the usual method into bonylimino or ureylene group, B is a pyrazolonyl radithe pyrazolone and saponification of the acetyl group cal and the -N=N-B grouping is bound to the in hy rochloric acid solution. benzene nucleus i Imposition to h Q CO NH If the dyestuff is dyed onto cotton by the processes group, usual for reactive dyestuffs from an alkaline bath in the The greenish tinge of these dyestuffs is very desirable presence of Sodium chloride or sodium sulphate at and important because the dyestuffs according to the 80l00, then a strong, brilliant, greenish yellow dyeinvention then become especially suitable for combinaing is obtained which has very good light fastness, extions with reactive dyestuffs based on copper phthalocellent fastness to washing and perspiration and can be cyanine which dye in turquoise shades. discharged well.

The expressions low and lower in connection EXAMPLE 2 N-Q-C own-@sour N N=NT-COOH NH Ha i 1 N N C1 l ti c1- or i w \N l sour with alkyl, alkoxy or alkylsulphonyl means, that these groups have at most five carbon atoms 75.8 g of the monoazo dyestuff obtained by coupling The following non-limitative examples illustrate the dlaFonzed I invention. The temperatures are given therein in ammo)benzene sulphonic acid with lphenyli4 degrees Centigrade. (3"-amino-4"-sulphophenyl)-carbonamide]-3-methylwhi i h f mulae given i these examples, pyrazol-S-one, in the form of the sodium salt, are slurand are used [0 represent the re ried in ml Of 20 warm water. The iS ml tive water-solubilizing acid groups, the dyestuff are ofconcentrated hydrochloric acid and then, within 15 usually obtained as the neutral sodium salts. The potasmmutes a Solution of g of Sodium nitrite in 20 mi 0f i salts and ammonium salts are obtained by water are added dropwise while stirring. After 2 hours,

a solution of 31.0 g of 1-(4'-sulphophenyl)-3-carboxypyrazol-S-one in 200 ml of water is poured in and the pl-l of the reaction mixture is adjusted to 7 with sodium carbonate. On completion of the coupling, the yellow dyestuff is completely precipitated by the addition of 5 sodium chloride, filtered off and dried in vacuo at 7080.

If the dyestuff is dyed onto cotton by the processes usual for reactive dyestuffs from an alkaline bath in the presence of sodium chloride or sodium-sulphate at the amino monoazo dyestuffs listed in the following Table I in column ll are diazotized as given in example 2 and reacted with the coupling components given in column Ill. The shades of the corresponding dyeings on cotton are given in column lV.

TABLE I I II III IV Amino monoazo dyestufi Coupling component 23 221 1 3 S 0 H Yellow.

I 1 """N 01 CH;

4 Same as above Do.

S 03H OH (JPmNH N=N I I l N NH; N\/N CH3 6 S 0 H Do.

S 03H OH N N l S 0311 I N NH cm s 03H s s 0,11 OH on Do I i -coNH- som NH 01- CONH N=N- I I l =N NH, IN

N \/N OH:

S 05H OH M Same as above Do. N N-QC ONHO-SOsH 01 j c ONH- N=N l 88.2 g of the amino disazo dyestuff of theform ula SOsH H in the form of the sodium salt, are dissolved in 1,000 ml of 60 warm water. 23 g of 2,4,5 ,6- tetrachloropyrimidine are added to this solution and the whole is condensed for 14 hours while stirring at 80-85, the pH being kept between 6 and 6.5 by the dropwise addition of 2N sodium carbonate solution. On completion of the condensation, the yellow dyestuff is completely precipitated by the addition of potassium chloride, filtered off and dried in vacuo at 60-70.

I II III IV Ex. h N 0. Amino monoazo dyestuff Coupling component $033: on

24. C1 C1 D0.

S 03H HO r-m mi --N=N "-oooH l C? N N I N N S OaH v l l ONH-Q-S on;

, CH Do CONH s 03H 1 8 H0 01- N=N H-CHa N N N E N l CONE-@S 03H EXAMPLE 26 if viscose staple fiber is dyed with this dyestuff by the son-1 OH Hms- NQ methods usual for reactive dyestuffs from an alkaline bath in the presence of sodium chloride at 8085, then a level, strongly colored greenish yellow dyeing 60 having excellent fastnes properties is obtained.

TABLE II III Shade on cotton Reactive component Ex. No. Amino disazo dyestufl Yellow.

SOaH

@NHZ

H01 N N=N CH:

SOaH

I II III IV Ex. Shade on No. Amino disazo dyestuff Reactive component cotton 44 do F F D- 45-.-" scan ('11 Do. H0aSN-=NI-CHa o1- 01 110i L I N N 1 \l/ s 03H A 0 ONE- S OaH 46..-.- s 03H Same as above D OaS- N=N Ul-GH: n

l s 01H HOTN\N H3O N=N- CH5 0 ONH s 0 H 47..." Same as above No:

EXAMPLE 48 This suspension is then stirred for minutes at SOaH 17.3 g of 2-aminobenzene sulphonic acid are dissolved with 10.5 ml of lON sodium hydroxide solution in 100 ml of water. After the addition of 6.9 g of sodiurn nitrite (100 percent) in the form of a 33.3 percent solution, the solution is added dropwise to a mixture of ..,.Q'.7. Q"? WHEEE BQILQEXHMQ d P is decom' posed by the addition of a small quantity of sulphamic acid.

The suspension of the diazonium salt is then added to a solution of 38.8 g of l-phenyl-[4'-N-(3"-amino-4"- sulphophenyl)-carbonamide]-3-methyl-pyrazol-5-one in 600 ml of water which contains 21 ml of lON sodium hydroxide solution and 20 g of sodium bicarbonate. The yellow solution obtained becomes opaque after a few minutes and the monoazo dyestuff precipitates as a jelly. After about 1 hour, no diazonium compound can be traced.

The pH of the dyestuff suspension is adjusted to 12.5 by the addition of the necessary amount of lOlN sodium hydroxide solution. The dyestuff dissolves. After adding 6.9 g of sodium nitrite (100 percent), in the form of a 33.3 percent solution, the clear solution of the amino monoazo dyestuff is added dropwise within about 2 hours at 2022 to about 100 ml of 5N hydrochloric acid. The diazotization is completed after stirring overnight. A little sulphamic acid is added and then the suspension of the diazonium azo compound 30 ml of concentrated hydrochloric acid and 100 g of Ob ned is added to a solution of 17.4 g of l-phenyl-3- ice, the addition being made while stirring at 0l0. The diazonium salt partly precipitates in the form of white crystals.

methyl-pyrazol-S-one and 4.5 g of sodium hydroxide in 500 ml of water and 500 ml of glycol monomcthyl ether.

TABLE II I 11 III IV Ex. Shadeon No. Amino disazo dyestufi Reactive. component cotton 36 .do N Do.

o1-( IT-c1 N N NH HO|SN=N -HCH: 01mm A 51 CH: N=N @NH, ONHQBOIH 38"... Same as above N\ D0- c-soflH cl-oc- 39 do /N D0- 40 do CHa DO- I N 01-0 C-N-I Tr c1oc- I 01 N=N l-CH: HzN c1 c1 s o H Roi L s o H L N\ 21 HO-- N I\|I=N --|LCH3 CONHQS 03H 43.... Same as above C001 D0- filtering off and drying, it is a water-soluble yellow powder which dyes wool and synthetic polyamide fibers in yellow shades which are fast to water, washing and light.

EXAMPLE 49 17.3 g of 2-aminobenzene sulphonic acid are diazotized as described in example 48 and coupled with 38.8 g of l-phenyl-[4'-N-(3"-amino-4"-sulphophenyl)-carbonamide]-3-methyl-pyrazol-5-one. The amino monoazo dyestuff obtained is then again diazotized as described in example 48. After the addition of a little sulphamic acid, the suspension of the diazotized dyestuff is added at room temperature to the solution of 21.4 g of l-phenyl-3-methyl-5-imino-pyrazole hydrochloride in 500 ml of water and 500 ml of glycol monomethyl ether.

The reaction of the coupling mixture is made neutral to congo paper by the addition of sodium acetate and the yellow suspension of the disazo dyestuff formed is stirred at room temperature until no more diazonium compound can be traced.

After heating to 60, the reaction mixture is made phenolphthalein alkaline by the addition of 10 N sodium hydroxide solution.

The disazo dyestuff obtained is salted out at 60 by the addition of sodium chloride and then filtered off. After drying, it is a water-soluble yellow powder which dyes synthetic polyamide fibers in very pure yellow shades. The dyeings have excellent fastness to water. washing, perspiration and light. The dyeings on texturized polyamide material are free from streaks.

Dyestuffs having similar properties are obtained if the amino azo dyestuffs listed in the following Table III in column ll are diazotized analogously to examples 48 and 49 and reacted with the coupling components given in column Ill. The shades of the corresponding dyeings on wool and synthetic polyamide fibers are given in column lV.

TABLE III I II III IV Example number Amino monoazo dyestufi 51 Same as above Shade on wool and synthetic polyamide Coupling component fibres Orange. CH

Yellow.

TABLE III-Continued I II III IV Shade on wool and synthetic Example polyamide number Amino monoazo dyestufl Coupling component fibres 54 grunge.

N= WCHI OH N I 110- HO:S

NH, NFPQ-BOM 66 Same as above OH Do.

I S 01H 66 do NH D0.

l S 01H N: --IlCH3 N Hg 110i N H038 NH: CONHQS 03H 68 0H Scarlet.

-N=N CH: t L NH:

acid

NH: 0 ONE-Q s 01H 59 CH;-C-CH3 Yellow.

l LL O=C N HO N S Oz NHI' c ONE-Q s 01H 60 Same as above I. CfHr-C-CH: D

NH-C 0CH1C1 TABLE III-Continued I II III IV Shade on wool and synthetic Example polyamide number Amino monoazo dyestufl Coupling component fibres CHr-(fi-CHa D0. HN=C 62 .-d0 CHr-- l a 63 CHr-C-CH; Do

N=N- TI-CH3 HN I 110- N I S OQNH] NH: OONHOS em 64 Same as above OH Do.

65 CH:CCH1 Do.

N=N *FCHI g 110% L N l NH: 0 ONHQ s 0:11

66 Same as abov CHr-C-CH; D0.

EN: /N

67 H CHr-F-CH; Do.

TF v 04 by N CH; HO 1?/ I OH I NH IIIH I 20 -c ONE-Q8 OaH OHICI S 0:11

3 1 EXAMPLE 68 SOQH 17.3 g of 2-aminobenzene sulphonic acid are diazotized according to example 48 and coupled in the known way with 39.5 g of l-phenyl-[40 -N-(3"-amino- 4"-sulphophenyl)-carbonamidel-3-methyl-5- iminopyrazole.

The amino monoazo dyestuff obtained is then again diazotized as described in example .48. After the addi tion of a little sulphamic acid, the suspension of the diazotized dyestuff is added at room temperature to the solution of 21.4 g of iminopyrazole hydrochloride in 500 ml of water and 500 ml-of glycol monom'ethyl ether.

The coupling mixture is made neutral to congo paper by the addition of sodium acetate. The yellow suspension of the disazo dyestuff formed is stirred at room I temperature until no more diazonium compound can be traced.

After heating to 60, the reaction mixture is made phenolphthalein alkaline by the addition of 10 N sodium hydroxide solution.

The disazo dyestuff obtained is salted out at 60, and filtered off. After drying, it is a water-soluble yellow powder which dyes synthetic polyamide fibers in very pure yellow shades. The dyeings have excellent fastness to water, washing, perspiration and light. Dyeings on texturized polyamidematerial are free frornstreaks.

EXAMPLE 69 2 g of dyestuff prepared according to example 67 and 3 g of ammonium sulphate. are dissolved in 5,000 ml of warm water. 100 g of well wetted wool fabric are introduced, the bath is brought to the boil within 30 minutes and dyeing is performed for 1 hour at the boil. The wool is then thoroughly rinsed with water. In this way a deep yellow dyeing is obtained which has very good wet fastness properties.

EXAMPLE 70 A printing paste was prepared by mixing 30 g of the dyestuff according to Example 2, with 100 g of urea and, while stirring, dissolving it in 360 ml of hot water. To the resulting solution, 10 g of the sodium salt of mnitrobenzene sulphonic acid are added and then the mixture is added with stirring to 475 g of 5 percent sodium alginate thickening. By stirring,.a homogeneous paste is obtained which is allowed to cool. 25 g of sodi- V um bicarbonate are added thereto.

Cotton fabric is'printed with this printing paste. After drying, the printed fabric is subjected for 2 minutes to a l-phenyl-3-m ethyl-5 dry heat of l40-l 60. After rinsing and soaping, a ye]- low wet-fast print is obtained.

We claim:

1. A dyestuff of the formula A represents phenyl or naphthyl either of which may be substituted by lower alkyl or sulphamoyl,

B represents 3-methyl -5-amino-pyrazol, 3-methyl-5- v N H) NHOO 01 (VIII) w NHG in which G is CO or S0 W is O or S, and Z is Cl, Br,

SO3'H+B' I (lX) NHC0-CH Cl (XI) F F Cl F -NHCO H I I vUH wherein E represents NH, *CONH-,

lower alkyl p representing 1 or 2, Z represents SO M or COO'Mflinked to a ring carbon ofA, Q or B,

M represents hydrogen, sodium or potassium,

m represents a positive integer of at most 3, and

n represents a positive integer of at most 5,

and wherein which when m is 3, one Y is linked to A and the other to B.

2. A dyestuff as defined in claim I, wherein m represents 1 and n represents 1 or 2.

3. A dyestuff as defined in claim 1, wherein m represents 2 or 3 and n represents an integer ranging from 2 to 5.

4. A dyestuff as defined in claim 3 wherein Y represents a fiber-reactive grouping selected from R Hal Hal Hal representing fluorine, chlorine or bromine,

Hal representing chlorine or bromine,

R representing hydrogen, chlorine, bromine or cyano, R representing fluorine, chlorine, bromine, lower alkylamino, or

( a'M )p.

,3 representing 1 b '2 and E representing -NH,

N--C 0NH' lower alkyl 5 qmkaflhe bond being linked to the remainder of Y.

5. A dyestuff as defined in claim 1, wherein Y represents a fiber-reactive grouping selected from R1 4 Hal 1 EM i 81 (II) Hal Hal representing fluorine, chlorine or bromine, Hal representing chlorine or bromine, R representing hydrogen, chlorine, bromine or cyano, R representing fluorine, chlorine, bromine, lower alkylamino, or

p representing 1 or 2, and E representing -NH,

-NHC ONH' lower alkyl or NH--C6", the bond being linked to the remainder of Y. 

2. A dyestuff as defined in claim 1, wherein m represents 1 and n represents 1 or
 2. 3. A dyestuff as defined in claim 1, wherein m represents 2 or 3 and n represents an integer ranging from 2 to
 5. 4. A dyestuff as defined in claim 3 wherein Y represents a fiber-reactive grouping selected from
 5. A dyestuff as defined in claim 1, wherein Y represents a fiber-reactive grouping selected from
 6. A dyestuff as defined in claim 4 which is of the formula
 7. A dyestuff as defined in claim 4 which is of the formula
 8. A dyestuff as defined in claim 4 which is of the formula 